Below is a round-up of the birth announcements from British newspapers. Sources include a national paper (The Telegraph, The Times) and a broad range of local newspapers from across England, Wales, Scotland and Northern Ireland.
Sibling names are in brackets. No official surnames are included; any name ending in a surname is actually a middle name.
Boys:
Archie Percival Marsden
Cassius Alexander de Beaumont
Charles Jago Thomas
Christopher Jackson (Alfred "Freddie" Louis)
Felix Charles Ragnar (Frederick Clive Mytton)
Frederick Christopher James
Frederick Louis Humphrey
Hugo George (Molly)
Hugo Timothy William (Cecily Madeleine Felicity)
Remy Andrew Lorimer (Florence Isobel Lettice & Ada Olave)
Sebastian Robin
William Charles Nicholas (Stella, Jessica & Edward)
Zachary
Girls:
Alba (Lyra)
Amelie Antonia (Genevieve & Charlotte)
Clementine Rose (Harriet)
Ellie Elizabeth
Florence Isla
Maci (Lewis, Kieran, Millie, Nairn, Oakley & Parker)
Phoebe Rey Hobbs (Reuben Leo Nicholas)
Remy Mae Kerry
Romilly Winter Bo (Cosmo Aubone Louis & Iona Everly Wren)
Rosalie Florence Godley
Sophie Laetitia Araminta (Henry)
Willa Charlotte Elizabeth (Theodore "Theo" Charles John)
Twins:
Huxley Harrison & Lilah Romalie
I cross-reference older BAs to find the full names of the siblings, however often they are missing (especially the eldest siblings, or for half-siblings) which explains why you will sometimes see something like: George Henry (Lucy, Emma & Jack Arthur). "Lucy" and "Emma" may well have middle names as well; I simply cannot find them online.